// Copyright (C) 2025 Kumo inc.
// Author: Jeff.li lijippy@163.com
// All rights reserved.
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published
// by the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.
//

#ifndef ROTHAR_PEGTL_CONTRIB_UTF16_HPP
#define ROTHAR_PEGTL_CONTRIB_UTF16_HPP

#include "../config.hpp"
#include "../internal/result_on_found.hpp"
#include "../internal/rules.hpp"

#include "internal/peek_utf16.hpp"

namespace rothar
{
   namespace utf16_be
   {
      // clang-format off
      struct any : internal::any< internal::peek_utf16_be > {};
      struct bom : internal::one< internal::result_on_found::success, internal::peek_utf16_be, 0xfeff > {};
      template< char32_t... Cs > struct not_one : internal::one< internal::result_on_found::failure, internal::peek_utf16_be, Cs... > {};
      template< char32_t Lo, char32_t Hi > struct not_range : internal::range< internal::result_on_found::failure, internal::peek_utf16_be, Lo, Hi > {};
      template< char32_t... Cs > struct one : internal::one< internal::result_on_found::success, internal::peek_utf16_be, Cs... > {};
      template< char32_t Lo, char32_t Hi > struct range : internal::range< internal::result_on_found::success, internal::peek_utf16_be, Lo, Hi > {};
      template< char32_t... Cs > struct ranges : internal::ranges< internal::peek_utf16_be, Cs... > {};
      template< char32_t... Cs > struct string : internal::seq< internal::one< internal::result_on_found::success, internal::peek_utf16_be, Cs >... > {};
      // clang-format on

   }  // namespace utf16_be

   namespace utf16_le
   {
      // clang-format off
      struct any : internal::any< internal::peek_utf16_le > {};
      struct bom : internal::one< internal::result_on_found::success, internal::peek_utf16_le, 0xfeff > {};
      template< char32_t... Cs > struct not_one : internal::one< internal::result_on_found::failure, internal::peek_utf16_le, Cs... > {};
      template< char32_t Lo, char32_t Hi > struct not_range : internal::range< internal::result_on_found::failure, internal::peek_utf16_le, Lo, Hi > {};
      template< char32_t... Cs > struct one : internal::one< internal::result_on_found::success, internal::peek_utf16_le, Cs... > {};
      template< char32_t Lo, char32_t Hi > struct range : internal::range< internal::result_on_found::success, internal::peek_utf16_le, Lo, Hi > {};
      template< char32_t... Cs > struct ranges : internal::ranges< internal::peek_utf16_le, Cs... > {};
      template< char32_t... Cs > struct string : internal::seq< internal::one< internal::result_on_found::success, internal::peek_utf16_le, Cs >... > {};
      // clang-format on

   }  // namespace utf16_le

#if defined( _WIN32 ) && !defined( __MINGW32__ ) && !defined( __CYGWIN__ )
   namespace utf16 = utf16_le;
#elif __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
   namespace utf16 = utf16_le;
#elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
   namespace utf16 = utf16_be;
#else
#error Unknown endianness.
#endif

}  // namespace rothar

#endif
